Sandblasting is the most common way to remove paint from metal, but it can be messy and hazardous. Choosing the right sand, wearing protective gear, and using a large compressed air tank are important for safety and efficiency. Clean up thoroughly after the process.
Removing paint from metal can be a difficult and messy job, and sandblasting is usually how it’s done. Sandblasting involves propelling fine-grained sand at high speed over the metal, thus chipping the paint. A few sandblasting tips can help save the user money, time, and frustration; one such suggestion involves the sand itself. Choosing the right sand is perhaps the most important step in the process, and many shops sell specific sand for sandblasting. Other sandblasting tips dictate using less expensive sand, but the choice of material should be done carefully.
Silica sand is a good choice because it’s effective, resists clumping, and is generally inexpensive, but silica can be hazardous to your health. Many sandblasting tips focus on safety, and perhaps the most important safety tip of all is to wear a respirator and goggles. The process must be done in a well-ventilated area, especially if silica sand is used. Many professionals recommend building or purchasing a blast cabinet for smaller jobs; this will contain the sand and allow the user to reuse the sand if it is collected properly and kept dry.
Compressed air is usually used to push the sand. Sandblasting bits usually mandate the use of a larger compressed air tank, as a tank that is too small will not be able to propel the sand at a high enough velocity to perform the blasting task. A 60 gallon (228 liter) tank is usually the minimum size required for blasting jobs, and at least a 7 horsepower engine will be needed. Anything smaller than these specifications will be inadequate for the blasting process; attempting work with smaller tanks and engines can lead to equipment damage and inefficient blasting work.
Other safety blasting tips include frequent breaks and avoiding touching your eyes and face. Sandblasting larger pieces can be messy and the process should, at best, take place outdoors, but if it is done indoors, the sand will end up all over the person sandblasting. Expect to get dirty and be careful around the eyes, nose, ears and mouth. Wash thoroughly once the process is finished to avoid sand remaining on the body. It’s a good idea to wear well-fitting clothes that can get dirty. When the process is complete, it is important to clean the space thoroughly to ensure that most of the sand is collected for reuse or disposal.
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